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公开(公告)号：DE69837372D1
公开(公告)日：2007-05-03
申请号：DE69837372
申请日：1998-10-28
Applicant: CANON KK
Inventor： ATSUTA AKIO
Abstract: This invention relates to a control apparatus for a vibration motor and, more particularly, to an apparatus capable of driving the vibration motor at high speed. This invention provides an apparatus capable of driving the motor at high speed by setting, as a driving start frequency of the motor, a frequency slightly higher than the boundary between the hysteresis and non-hysteresis ranges of the vibration motor.
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公开(公告)号：DE69330534D1
公开(公告)日：2001-09-13
申请号：DE69330534
申请日：1993-01-28
Applicant: CANON KK
Inventor： ATSUTA AKIO
Abstract: A vibration driven motor or actuator has a piezoelectric element, arranged in a vibrating member, for generating a vibration in a first direction, and another piezoelectric element, arranged in the vibrating member, for generating a vibration in a second direction different from the first direction. In the motor or actuator, the vibrating member has a recess portion shaved by, e.g., a laser, or a portion added with a mass, so that the natural frequencies of a given vibration mode of the vibrations in the first and second directions coincide or substantially coincide with each other.
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公开(公告)号：DE69120307D1
公开(公告)日：1996-07-25
申请号：DE69120307
申请日：1991-01-31
Applicant: CANON KK
Inventor： TSUKIMOTO TAKAYUKI , MAENO TAKASHI , MUKOHJIMA HITOSHI , KANAZAWA HAJIME , KOREEDA SHINICHI , CHIBA ICHIRO , ATSUTA AKIO
Abstract: In a vibration wave driven motor wherein an AC electric field is applied to an electro- mechanical energy conversion element secured to an elastic member to thereby excite a plurality of standing waves differing in phase from each other in the elastic member and a travelling wave is formed in the elastic member by the combination of the standing waves, whereby a member which is in pressure contact with the elastic member and the elastic member are moved relative to each other by a frictional force, provision is made of means for making the contact pressure on the surface of contact between the elastic member and the member which is in pressure contact with the elastic member non-uniform, and means for making the dynamic rigidity of a vibration member non-uniform in an unnecessary vibration mode created by the means for making the contact pressure non-uniform, whereby the occurrence of noise is prevented by simple and inexpensive means.
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公开(公告)号：DE69108946T2
公开(公告)日：1995-10-05
申请号：DE69108946
申请日：1991-01-31
Applicant: CANON KK
Inventor： ATSUTA AKIO
Abstract: This invention relates to a vibration type motor in which frequency signals differing in phase from each other are applied to an electro-mechanical energy conversion element disposed on a vibration member to thereby vibrate the vibration member and drive a movable member by the vibration force. This invention provides a motor of the described type in which a monitoring portion for detecting the vibrated state of the vibration member is provided at a location avoiding a location at which the rigidity of the vibration member exhibits rigidity differing from the rigidity of the entire vibration member so that the vibrated state can be accurately detected.
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公开(公告)号：DE3538062A1
公开(公告)日：1986-04-30
申请号：DE3538062
申请日：1985-10-25
Applicant: CANON KK
Inventor： NISHIMOTO YOSHIFUMI , OKUNUKI MASAHIKO , KARIYA TAKAO , KAWAI YASUO , ATSUTA AKIO
Abstract: A position detecting device for detecting the position of an object includes an illumination optical system for producing a light beam and for irradiating the object with the light beam, an optical system for focusing the light beam, a focus position controlling system operative to change the position at which the light beam is focused by the focusing optical system, a first detecting device for receiving the light beam reflected from the object to detect the state of incidence of the light beam on the object, and a second detecting device for detecting the position of the object on the basis of the detection of the state of incidence of the light beam on the object by the first detecting means.
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Patent Agency Ranking
公开(公告)号：DE69838595T2
公开(公告)日：2008-07-24
申请号：DE69838595
申请日：1998-12-07
Applicant: CANON KK
Inventor： ATSUTA AKIO , YAMAMOTO SHINJI , KATAOKA KENICHI , HAYASHI TADASHI , ITO JUN
Abstract: A driving apparatus for a vibration type actuator (9) for obtaining a driving force by applying a periodic signal to an electro-mechanical energy conversion element so as to generate a vibration on a vibration member, includes: detection means (10) for detecting a driving state of said vibration type actuator; calculation means (1) for calculating a difference between the driving state obtained from said detection means and a predetermined state; first integrating means (2) for integrating a value output from said calculation means at a first timing; second integrating means (3) which integrates the value output from said calculation means at a second timing, and in which an integrating value is reset every predetermined number of integrating operations; a register (5) for holding the integrating value of said second integrating means before resetting said second integrating means each time; addition means (6) for adding values output from said first integrating means and said register; and an adjustment circuit (7,8) for adjusting an energy amount supplied to the electro-mechanical energy conversion element in accordance with an output from said addition means.
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公开(公告)号：MY135110A
公开(公告)日：2008-02-29
申请号：MYPI20033049
申请日：2003-08-11
Applicant: CANON KK
Inventor： IGAKI MASAHIKO , ATSUTA AKIO
Abstract: A ROTATION INFORMATION RECORD SURFACE OF A ROTARY DISK (25) IS DISPOSED AT AN INTERMEDIATE POSITION BETWEEN A FIXING POINT OF THE ROTARY DISK (25) AND A ROTARY SHAFT (22) AND A FIXING POSITION OF A DETECTION HEAD, SO THAT A STABLE GAP CAB BE OBTAINED WITH A VARIATION DUE TO THERMAL EXPANSION BEING REDUCED. IN ORDER TO ATTAIN THIS, THE FITTING PORTION OF THE ROTARY DISK (25) IS SHAPED TO HAVE A FIRST FITTING PORTION AND A SECOND FITTING PORTION. THE FIRST FITTING PORTION IS PROVIDED FOR ATTAINING SATISFACTORY COAXIALITY, AND THE SECOND FITTING PORTION IS ADAPTED TO FORM A CLEARANCE INTO WHICH BONDING MEANS SUCH AS AN ADHESIVE IS TO BE INFUSED. WITH THE ABOVE STRUCTURE, AN OPTIMUM DETECTION POSITION (I.E. AN OPTIMUM GAP POSITION) WOULD NOT BE VARIED BY A CHANGE IN THE AMBIENT TEMPERATURE.
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公开(公告)号：DE69127308T2
公开(公告)日：1997-12-18
申请号：DE69127308
申请日：1991-04-04
Applicant: CANON KK
Inventor： ATSUTA AKIO
Abstract: A vibration wave driven motor includes a vibrator, a plurality of driving electro-mechanical energy conversion element portions disposed in the direction of lamination relative to the vibrator, frequency signals of different phases being applied to the conversion element portions, and a monitoring electro-mechanical energy conversion element provided in the vibrator in the direction of lamination relative to the conversion element portions.
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公开(公告)号：DE69127308D1
公开(公告)日：1997-09-25
申请号：DE69127308
申请日：1991-04-04
Applicant: CANON KK
Inventor： ATSUTA AKIO
Abstract: A vibration wave driven motor includes a vibrator, a plurality of driving electro-mechanical energy conversion element portions disposed in the direction of lamination relative to the vibrator, frequency signals of different phases being applied to the conversion element portions, and a monitoring electro-mechanical energy conversion element provided in the vibrator in the direction of lamination relative to the conversion element portions.
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公开(公告)号：DE602005002287D1
公开(公告)日：2007-10-18
申请号：DE602005002287
申请日：2005-03-02
Applicant: CANON KK
Inventor： ATSUTA AKIO , IGAKI MASAHIKO
Abstract: A main scale of an optical displacement measuring apparatus has slits arranged on it at regular intervals, a part of which is a missing slit that does not allow light to pass through used for detecting the original point. An index scale has four sets of windows formed on it. The four windows are arranged with mutual phase differences of 1/4P, where P is the pitch of the arrangement of the slits. When a part of the missing slit overlaps with the index scale, no light reaches to photodiodes from the missing slit and only a partial light flux passes through a window, so that the light quantity decreases. An original point signal associated with the missing slit can be obtained by adding up the outputs of all the photodiodes.
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